Soap compositions



Patented Sept. 29, 1936 i UNITED STATES PATENT OFFICE 2.05am soarcomos'rrrons Jack Leben, Bushey, England, assignor to Ormnl Products,Limited. London, England No Drawing. Application December 15, 1933,Serial No. 102,643. In Great Britain December (llaiml. (01. 87-5) Thisinvention relates to compositions of matused in accordance with theinvention, the folter containing soaps, the wordsoap being used lowingare given:- hereinafter as indicating alkali metal compounds Benzoicacid and its homologues, and derivaof fatty acids or sulphonationproducts or detives, the toluic acids and the like: or chloroor 6rivatives thereo nitro-benzoic acids or anthranilic acid and the is Oneof the objects of the invention is to prolike; vide compositions ofmatter possessing quick and Salicylic acid and its derivativesand-homocopious and yet lasting lathering properties. logues such asthiosalicylic, acetylsalicylic; gallic,

A further object of the invention is to provide tannic acids, ortanninand the like; 10 compositions of matter adapted to be employedHomologues andderivatives of phenylacetic l0 for the purposes to whichsoaps are normally acid, for instance amino-phenylacetic acid, or

employed and particularly compositions of mathydrocinnamic acid and thelike; ter containing soaps possessing a high degree of Thephthalicacids, their homologues and destability in storage and use and which,for. in-- rivatives such as mellitic acid, phthalimide and stance, donot develop rancidity whereby, for the like.

instance, in the production of perfumed saponl- The alkylolamine saltsof poly-carboxylic fled compositions a change in odor will be avoidedacids employed in accordance with the invenand the employment of largeproportions of tion may be those in which all or only certain of maskingperfumes rendered unnecessary. the carboxylic groups are combined withalkylolprovide compositions of matter adapted for-use ing carboxylicgroups may be combined with as detergents and other purposes to whichsoaps other organic or with inorganic bases. are applied which in thepresence of water are The alkylolamine salts may be compounds of moreresistant to hydrolysis and which will not mono-, di-, ortrlalkylolamines, for instance,

A still further object of the invention is to amine residues and in thelatter case the remain- 20 saponify or otherwise decompose fatty matter.mono-, di-, or triethanolamines. or propanol- 25 The invention is basedupon the observation amines and the like.

that the foregoing objects may be achieved by the Generally, however,salts of commercial ethaincorporation with alkali-metal salts of highernolamine will be used.

fatty acids, of a proportion of alkylolamine salts In the production ofcompositions in accord- The alkylolamine salts employed may be almay befirst formed and then added to the other kylolamine salts of acidscontaining mono-cyclic constituents of the composition, for instance, toor poly-cyclic groups and they may be salts of a preformed body of soapor the salts may be substituted or unsubstituted aromatic mono or formedin situ in the composition. poly carbocyclic. acids including salts ofacids Thus, for example the soap may be mixed with 35 in which one ormore of the hydrogen atoms an alkylolamine and theacid employed forformof the nucleus or a side-chain are replaced ing the salt of thealkylolamine added at the same by groups such as the hydroxyl group, thenitro time or subsequently. group, the amino group, an alkyl. group orby The following particulars are given by way of halogens, for instance,chlorine, or acids in which example to illustrate suitable manners ofcarry- 44 the hydrogen atom of an hydroxyl group ating the inventioninto effect:- tached to the nucleus or to a side-chain issubsti- Exam Z81 tuted by an acyl or by an alkyl or aryl group. p

g Thus, alkylolamine salts of monocarboxylic 150 parts of commercialtriethanolamine which acids in which the carboxylic group is directlyconsists of a mixture of mono-, di-', and tri-hy- 41 connected to thearomatic nucleus may be emdroxy-mono-, diand tri-ethylamine, the latterployed as may also be acids in which the nucleus compound predominating,are warmed slightly is connected through a saturated or unsaturated andmixed with 125 parts of benzoic acid; heatside-chain with a carboxylicgroup. ing and agitation is continued until the acid dis- Further, theremay be employed in accord-' solves in the triethanolamine to a paleyellow 5 ance with the invention alkylolamine salts of semi-liquid masswhich solidifies on cooling. This acids in which an aromatic acyl groupis concompound namely the benzoic acid salts of the nected with an aminoaliphatic acid. alkylolamines which is more or less crystalline, is Asexamples of acids containing a carbocyclic dissolved in warm water or inwarm glycerinated 55. group, the alkylolamine salts of which may bewater, that is water containing a small percent- 5 of aromaticcarboxylic'acids. ance with the invention, the alkylolamine salts b 140parts of salicylic acid are stirred into 150 parts of commercialtriethanolamine and warmed until the acid dissolves to a yellowsyrupafter which about 30 parts of boric .(boracic) acidrare incorporated,and mixed and heated until a homogeneous viscous liquid is obtained.This product is mixed with from five to ten times its weight of soap inthe manner indicated in the previous example.

Example 3 150 parts of salicylic acid, British pharmacopoeia, or itsequivalent weight of commercial product, are mixed thoroughly with 150parts of triethanolamineuntil the salicylic acid dissolves in thetriethanolamine forming a homogeneous viscous to semi-solid mass.

Example 4 136 parts of pure phenylacetic acid or its equivalent weightof the commercial acid are mixed with warm triethanolamine resulting ina viscous to semi-solid mass which solidifies on cooling. This productcan be used also as a substitute for soap perfume. 1

Example 5 150 parts of triethanolamine are mixed with 85 partsofphthalic acid and agitated until dissolved giving a straw colouredviscous liquid.

Example 6 150 parts of triethanolamin e are mixed, if necessary with theaid of heat, with 170 parts of phthalic acid and stirred until solutionis effected.

Example 7 The product of the foregoing example is mixed with a metallichydroxide or a metallic compound, for example the 318 parts of the agentare combined with 40 parts'of sodium hydroxide, or with 100 parts ofpotassium carbonate.

Example 8 Example 9 208 parts of naphthalene sulphonic acid are mixedwith 150 parts of triethanolamine and heated until dissolved.

In connection with Examples 3 to 9 it is to be remarked that the productobtained in accordance with these examples is mixed with soap insuitable proportions or otherwise worked up into compositions of matterin combination with other materials and particularly such as are of asaponaceous character.

By the incorporation of alkylolamine compounds in accordance with theinvention in soaps formed in such manner as to give a quick butevanescent lather the lather given by such soaps may be stabilized.

In conclusion it is to be pointed out that the invention isconcernedwith the production of soaps in the form in which they arenormally sold and it extends merely to the incorporation in such soapsof the salts of alkylolamines as distinguished from the esters, amides,or esteramides formed by the interaction of alkylolamines and acids.

I claim:

1. A soap consisting essentially of an alkali metal salt of a higherfatty acid, associated with from 5 to 20 per cent of an alkylolaminesalt of salicylic acid, as a retarder of hydrolysis.

2. A soap consisting essentially of an alkali metal salt of a higherfatty acid in association with an alkylolamine salt of an aromaticcarboxylic acid in a proportion of between 5 and 20 per cent of theamount of the former, whereby the degree of hydrolysis of the alkalimetal salt when dissolved in water, is reduced.

JACK LEBEN.

